Uninstall previous version and then install prerequisites

[hadas]

Hi,

Due to a bug in the uninstall of the previous version, I need to first uninstall the prev and only then install the prerequisites and the new versions.

How can I achieve that?

Thanks,
Hadas

[Eusebiu]

Hi Hadas,

In order to achieve this, you can add your prerequisites as "post-install". If you want to have them as "feature-based", you also need to go in the Custom Actions page and add the "Uninstall previous version" predefined custom action. However, the prerequisites should not be added as "pre-install".

Best regards,
Eusebiu

[hadas]

Hןת

Can I locate the uninstall custom action after the user choose install and before the feature-prerequisites starts?

Thanks
Hadas

[Eusebiu]

Yes, to achieve this, you can add it "without sequence" in the Custom Actions page, then place it as a published event on the "Install" button.

Best regards,
Eusebiu

[hadas]

Thanks,

and than how I launch the install?

[Eusebiu]

When the "Install" button will be pressed, the "Uninstall previous version" custom action will be executed, which will uninstall the old version and after it the installation of the prerequisites and new version will be performed.

Best regards,
Eusebiu

[hadas]

I did that but it didn't worked. The uninstall custom action didn't happened

[Eusebiu]

I'm not sure why it did not work. Please make sure that the condition set for that custom action is true during the installation. Also, the uninstallation will be performed only if an older version of the application with the same Upgrade Code is found on the machine.

Please send us a verbose log of the installation if you cannot get it to work.

Best regards,
Eusebiu